| 摘要 |
<p>A gas mass flow rate detector for detecting the mass flow rate of gas flowing in a passage exerts a force for operating a valve just in balance with a force produced by the pressure difference between the front end and the rear end of a valve element disposed in the gas passage, the force being exerted on the valve element, thereby to hold the pressure difference constant so that the area of the opening of the valve element is proportional to the gas flow rate so as to detect the area of the opening for measuring the gas flow rate. The aforementioned valve operating force is hydraulically applied. The detector incorporates a hydraulic liquid density variation correcting element. With this correcting element the area of the opening of the valve element becomes proportional to the gas mass flow rate. This mass flow rate detector is used for measuring the air in a fuel injection system. </p> |
